如何在Windows应用商店应用中使用WCF时禁用Expect：100-Continue

Question

I need to get rid of the Expect: 100-Continue header in HTTP message, when communicating with WebService using WCF in Windows Store App. I have found a lot of solutions, but none of them is possible in Windows 8:

1. ServicePoint.Expect100Continue = false; doesn't exist in Store App any more (No SericePoint or ServicePointManager class),
2. I cannot change configuration in web.config file, because it doesn't exist in Store App,
3. It is possible to change the flag in HttpClient , but I cannot access it, when using WCF,
4. I tried to manipulate with message headers using IClientMessageInspector , but the default HTTP headers are being added later, in higher layers, so my changes will be ovverriden.

Does anyone have any other ideas?

Answer 1

There are 2 ways to deal with this.

You can turn set expect100Continue="false" in you app.config or web.config, but this will be global . This could be an issue if some external services prefer to use the header expect100Continue. Here's how:

<system.net>
     <settings>
        <servicePointManager expect100Continue="false"/>  
     </settings>
</system.net>

Or you can do it in code for a specific endpoint as follows:

System.Net.ServicePoint servicePoint =
     System.Net.ServicePointManager.FindServicePoint(myWcfService.Endpoint.Address.Uri);
servicePoint.Expect100Continue = false;
// now execute some service operation